Snickerdoodle Blondies

Bahan-bahan (16 porsi)

• 3/4 cup (12 Tbsp; 170g) unsalted butter, softened to room temperature
• 3/4 cup (150g) granulated sugar
• 3/4 cup (150g) packed light brown sugar
• 2 large eggs, room temperature
• 2 teaspoons pure vanilla extract
• 2 and 1/3 cups (291g) all-purpose flour (spooned & leveled), plus more as needed
• 1 and 1/2 teaspoons baking powder
• 1/2 teaspoon cream of tartar
• 1/2 teaspoon salt
• 1 cup (180g) white chocolate morsels, plus 1 Tablespoon for topping
• 1/4 cup (50g) granulated sugar
• 2 teaspoons ground cinnamon